package apibasej.basic.misc.io;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

public class UtilSearch extends UtilFile {

	// otimizar para não varrer novamente os filhos já varridos 
	
	private File found = null;
	private String regexToFound;
	
	public File searshAllUp(String regexToFound, File pathIni){
		File f = search(regexToFound, pathIni);
		if(f==null && pathIni.getParentFile()!=null) {
			pathIni = pathIni.getParentFile();// vai subindo até encontrar
			f = searshAllUp(regexToFound, pathIni);
		}
		return f;
	}
	
	public File search(String regexToFound, File path){
		found = null;
		this.regexToFound = regexToFound;
		readFilesDirs(path.listFiles());
		return found;
	}
	
	@Override
	public void readFilesDirs(File[] listDirs) {
		if(found!=null) return;
		else super.readFilesDirs(listDirs);
	}
	@Override
	public void eventAddFile(File f) {
		super.eventAddFile(f);
		if(regexToFound!=null && f.getPath().matches(regexToFound)){
			found = f;
		}
	}
	
    /**
     * Scans all classes accessible from the context class loader which belong to the given package and subpackages.
     *
     * @param packageName The base package
     * @return The classes
     * @throws ClassNotFoundException
     * @throws IOException
     
    public static Class<?>[] getClasses(String packageName) throws ClassNotFoundException, IOException {
        ClassLoader classLoader = Thread.currentThread().getContextClassLoader();
        assert classLoader != null;
        String path = packageName.replace('.', getFileSeparator().charAt(0));
        System.out.println("pppp>"+path);
        Enumeration<URL> resources = classLoader.getResources(path);
        List<File> dirs = new ArrayList<File>();
        while (resources.hasMoreElements()) {
            URL resource = resources.nextElement();
            System.out.println("rrrr>"+resource);
            dirs.add(new File(resource.getFile()));
        }
        ArrayList<Class<?>> classes = new ArrayList<Class<?>>();
        for (File directory : dirs) {
            classes.addAll(findClasses(directory, packageName));
        }
        return classes.toArray(new Class[classes.size()]);
    }
	*/
	
    /**
     * Recursive method used to find all classes in a given directory and subdirs.
     *
     * @param directory   The base directory
     * @param packageName The package name for classes found inside the base directory
     * @return The classes
     * @throws ClassNotFoundException
     */
    public static List<Class<?>> findClasses(File directory, String packageName) throws ClassNotFoundException {
        List<Class<?>> classes = new ArrayList<Class<?>>();
        if (!directory.exists()) {
            return classes;
        }
        File[] files = directory.listFiles();
        for (File file : files) {
            if (file.isDirectory()) {
                assert !file.getName().contains(".");
                classes.addAll(findClasses(file, packageName + "." + file.getName()));
            } else if (file.getName().endsWith(".class")) {
                classes.add(Class.forName(packageName + '.' + file.getName().substring(0, file.getName().length() - 6)));
            }
        }
        return classes;
    }
    
    
}
